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A ladder 12 ft. long leans against a wall, touching it 8 ft. above the ground. What is the slope of the ladder?

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Pythagorean Theorem:

a^2 + b^2 = c^2

8^2 + b^2 = 12^2
64 + b^2 = 144
b^2 = 80
b = 8.9 feet

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